Line Buffer Wordlength Analysis for Line-Based 2-D DWT

Author

Cheng, Chih-Chi ; Huang, Chao-Tsung ; Chang, Jing-Ying ; Chen, Liang-Gee

Author_Institution

Dept. of Electr. Eng., Nat. Taiwan Univ., Taipei

Volume

3

fYear

2006

fDate

14-19 May 2006

Abstract

The on-chip line buffer dominates the total area and power of line-based 2-D DWT. Therefore, the line buffer wordlength has to be carefully designed to maintain the quality level due to the dynamic range growing and the round-off errors. In this paper, a complete analysis methodology is proposed to derive the required wordlength of line buffer given the desired quality level of reconstructed image. The proposed methodology can guarantee to avoid overflow of coefficients, and the difference between predicted and experimental quality level is averagely 0.06 dB in terms of PSNR

Keywords

discrete wavelet transforms; image reconstruction; PSNR; Peak signal-to-noise ratio; dynamic range growing; image reconstruction; line buffer wordlength analysis; line-based 2-D DWT; on-chip line buffer; round-off errors; Chaos; Computer buffers; Digital signal processing; Discrete wavelet transforms; Dynamic range; Image analysis; Image reconstruction; Maintenance engineering; Registers; Roundoff errors;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech and Signal Processing, 2006. ICASSP 2006 Proceedings. 2006 IEEE International Conference on

Conference_Location

Toulouse

ISSN

1520-6149

Print_ISBN

1-4244-0469-X

Type

conf

DOI

10.1109/ICASSP.2006.1660806

Filename

1660806